Stupid question about what adapter to use with this scuba tank to fill shot tank.

[LightningCh]

OK so, finally got round to purchasing a scuba tank. To fill my shot tank from.

Found it cheap, preowned but unlimited life, 7 Litre. 300 bar....

But...

This is what happens when you purchase a scuba tank, and don't really 100% know what you are doing or looking for ??

Info on the tank.

View attachment 39946

And the valve at the top

View attachment 39944

View attachment 39945

So, im aware the wheel on the left opens the valve to release the air... But other than that... There doesnt apparently seem to be a bleed valve? And... What adapter do i actually need to fill a 48cl 3000psi tank from it? Anyone know? 

Thanks in advance.

 

[LightningCh]

Searching around, and asking others and this has popped up

A 1/4 to 1/8 BSP adaptor
https://www.godive.net/go-shoot/charging-cylinders-and-accessories/air-gun-hose-assembly/

And the connector.
https://www.godive.net/go-shoot/charging-cylinders-and-accessories/quick-release-snap-connector/

Considering its a 300 BAR tank, going into a 3000psi tank (which is 232 BAR right?)
Is that going to work? Or will I just blow my shot tank straight away?

 

[Tommikka]

I’m going to say from the picture that you have an ‘A clamp’ valve, and need a ‘standard’ clamp on fill station adaptor 

Dont hold the cylinder like he seems to do (facing your crotch). If something ever goes wrong you don’t want that to be a target

Also keep hands etc clear of the burst disks

Note that your scuba cylinder is 300bar which can be filled to 4500psi, your playing cylinder can only be filled to 3000psi.  If you invest in a regulated system (which would mean going through specialist suppliers) then you can physically prevent overfilling, but if you stick to slowly filling and keeping an eye on both gauges then you can stop at 3000psi safely

Ideally fill as often as possible with top ups to as low a fill as possible 

If you fill from empty to 3000psi then you take the ‘most’ air from the source scuba bottle and it will lose its pressure quicker than regular short fills.

If you take less pressure in the playing bottle then you maintain the scuba air for longer 

If you start with 3000psi in your scuba and fill the playing cylinder to 3000psi then you end up with them equalising pressure at something like 2999psi, then less on the next fill etc 

That won’t matter too much as your guns operating pressure is very low, and the playing cylinders regulator will probably output at 450-650psi, so you will get a lot of shooting from one fill from the scuba shop etc

But if you keep down to between 2500psi/2800psi per fill then your source scuba maintains its pressure for longer and you make less trips to the scuba shop

You of course get more VFM with a 4500psi fill from the scuba shop and can splash out with a true 3000psi playing fill while maintaining scuba pressure, but if you still restrict playing fills from the start then you will have a much longer time between scuba shop visits

This May of course depend on how much you use per game/day and if you bring your scuba to the site or leave it at home

A clamp fill station

https://www.justpaintball.co.uk/a-clamp-air-fill-station.html

DIN fill station:

https://www.bzpaintball.co.uk/totemair-din-air-fill-station

Rememember - fill slowly and if filling from empty then stop and start. When the playing cylinder warms up stop and wait.  

Hot air means fast fills and isn’t good for you or the cylinder.  But it also means false pressure readings as the pressure will drop when it cools down

 

[Prisce]

Searching around, and asking others and this has popped up

A 1/4 to 1/8 BSP adaptor
https://www.godive.net/go-shoot/charging-cylinders-and-accessories/air-gun-hose-assembly/

And the connector.
https://www.godive.net/go-shoot/charging-cylinders-and-accessories/quick-release-snap-connector/

Considering its a 300 BAR tank, going into a 3000psi tank (which is 232 BAR right?)
Is that going to work? Or will I just blow my shot tank straight away?

No clue on HPA in Airsoft, but I work with HPA in the real world. 

A regulator drops pressure, so you have 300 bar going in, you set the regulator to 232 bar and it will only allow 232 bar into the shot tank.

Regulators have different thread shapes/sizes/screw patterns so you need to get one for the type of system your using, I think this is an A clamp system.

Depending on the machine used to fill your scuba tank will depend on how it should be done. If your using a high pressure high flow machine it should be done under water, if using a high pressure low flow system it will be fine out in the open but it will take literal hours to fill. 

Many scuba shops dont do any of this, but it is for safety.

 

[LightningCh]

Alright thanks for the info guys

I just checked the threads on the right, and well it looks an A clamp wouldn't fit at all as the air is released from the right side through this bit hereView attachment 39949

Didn't even have anything in this threading already, and it doesn't even look like the ones in the videos as its got 2 holes at the back... 

I've messaged the original owner in case something has been missed off.

 

[Tommikka]

Alright thanks for the info guys

I just checked the threads on the right, and well it looks an A clamp wouldn't fit at all as the air is released from the right side through this bit hereView attachment 39949

Didn't even have anything in this threading already, and it doesn't even look like the ones in the videos as its got 2 holes at the back... 

I've messaged the original owner in case something has been missed off.

That does look more like a DIN fitting.

Is the one in the earlier pics sealed off so that air is only released through the larger fitting?

The best thing would be to have your local dive shop look at it, they will know the different types

 

[LightningCh]

That does look more like a DIN fitting.

Is the one in the earlier pics sealed off so that air is only released through the larger fitting?

The best thing would be to have your local dive shop look at it, they will know the different types

It would seem so, air only seems to leave from the larger fitting. 
*sigh* why cant i ever get something simple ?

Guess I better try the dive shops if the original owner doesn't respond

 

[RR01]

You can probably get the whole valve system changed for one that used by airgun shooters.  It will need a bleed valve and guage, as you cannot release the fill adaptor from the gun, or smaller bottle, without releasing the pressure in the connection tube.  Search online for local gun shops who should be able to point you in the direction of a dive shop that can do the swap for you, although you will have to fully de-pressurise the cylinder before they can work on it.

 

[LightningCh]

You can probably get the whole valve system changed for one that used by airgun shooters.  It will need a bleed valve and guage, as you cannot release the fill adaptor from the gun, or smaller bottle, without releasing the pressure in the connection tube.  Search online for local gun shops who should be able to point you in the direction of a dive shop that can do the swap for you, although you will have to fully de-pressurise the cylinder before they can work on it.

So you saying that just reminded me that I have an airgun store "Solware" literally 5 minutes down the road.
No idea what they are like in person though. But they will probably be my best bet for it.

Thanks. 

 

[Tommikka]

It would seem so, air only seems to leave from the larger fitting. 
*sigh* why cant i ever get something simple ?

Guess I better try the dive shops if the original owner doesn't respond

That’s ought to be it then, a DIN fill station should do you

But you can get proper confirmation in one of the shops with eyes on

 

[Shizbazki]

OK so, finally got round to purchasing a scuba tank. To fill my shot tank from.

Found it cheap, preowned but unlimited life, 7 Litre. 300 bar....

But...

This is what happens when you purchase a scuba tank, and don't really 100% know what you are doing or looking for ??

Info on the tank.

View attachment 39946

And the valve at the top

View attachment 39944

View attachment 39945

So, im aware the wheel on the left opens the valve to release the air... But other than that... There doesnt apparently seem to be a bleed valve? And... What adapter do i actually need to fill a 48cl 3000psi tank from it? Anyone know? 

Thanks in advance.

Hi mate looks like your in a bit of a pickle but i'm here to help.

That is a 300Bar (or 4500PSI) tank

If its a 300 Bar it will always come with a DIN fitting as they are far safer than A-clamp fittings or so im told by a friend who has more scuba diving qualifications than i can count on both my hands.

To fill you HPA tanks, all you will need is this: https://www.justpaintball.co.uk/din-fit-air-fill-station.html

Screw that on to the big opening end hand tight.

Plug your HPA tank into it

Open the tap on the scuba tank slowly and you'll hear the transfer of air

If you have 3000PSI tanks you can fill them from 4500PSI scuba tank, but just keep an eye on the pressure gauge on the HPA tank (no other gauge, just the small one on the tank itself)

Once you reach say 2500 to 2700PSI start closing off the tap

Push in the small button on the HPA fill station, you should hear a short "ppppssshhh" as you purge the air from the fill station

Then remove the HPA bottle

Rinse and repeat until all your bottles are done

Points to note

Once the HPA tanks are filled, if you use them fill them up, little and often is better than big refills

When filling up empty HPA tanks go easy and fill slowly, don't go slamming open the tap otherwise you might create stress and fatigue on the tank. Thats why scuba shops often fill tanks slowly

You'll probably notice the tank get warm as you fill it up, especially if its empty.

Don't bother getting a compressor as they need to have moisture removal filters and most compressors can't fill to the pressure required. If you do expected to drop £500 - 1000+ for a HPA compressor.

Don't even think about stirrup pumps unless you want to work HPA pumping as part of a fitness routine.

 

[LightningCh]

Hi mate looks like your in a bit of a pickle but i'm here to help.

That is a 300Bar (or 4500PSI) tank

If its a 300 Bar it will always come with a DIN fitting as they are far safer than A-clamp fittings or so im told by a friend who has more scuba diving qualifications than i can count on both my hands.

To fill you HPA tanks, all you will need is this: https://www.justpaintball.co.uk/din-fit-air-fill-station.html

<snip>

Thanks mate   

At least I have a definite answer for the DIN or A clamp and such.

So hopefully that above fill station will fit it, although  i may still stake it to solware at the weekend just to be double sure ?